101-14 SEA LEVEL CREEK K 104 
N55°22.4 W131°11.4 (Gokachin River) Previous No. 104 
KETCHIKAN, THORNE ARM, E. shore near head 1.5 miles S.E. of Pop Island 
MAJOR SPECIES Pink OTHER SPECIES Chum, coho, trout 
ESCAPEMENT TIMING Late. Sep. -Oct. ESCAPEMENT MAGNITUDE >10,000 
SPAWNING FACILITIES Good spawning areas limited to only parts of the stream by bedrock and large rocky 
areas. Salmon production has been good in the past for the facilities. 
STREAM TEMPERATURES Warm range. Observed temperatures: 49°F. , 9/25/50; 45-55°F., 1951; 49°F. , 
9/12/52; 51°F. , 9/11/53. 
VALLEY DESCRIPTION Glacial origin. Stream follows geologic structure in relatively straight course for 
long sections. Broad valley, timbered with scattered muskeg patches, runs S.E. with head in ridge. 
DRAINAGE _ 22 square miles (Polar Planimeter). Precipitation fed. Small lake in upper drainage, few small 
muskeg ponds. Relatively thin topsoil region with rapid precipitation run off. 
STREAM MOUTH IDENTIFICATION Sea Level Mine remnants visible on N. side of creek mouth. 
ANCHORAGE Small cove S. of mouth offers some shelter. Fair weather anchorage off mouth. 
TRAILS AND SURVEY ROUTES A poor trail follows main stream to fork along N. bank. Easy route between 
forks by game trail. S. bank route preferred during high water. 
AERIAL SURVEY NOTES Limited visibility except during good weather. 
INTERTIDAL ZONE 
LENGTH .3 mile AVERAGE WIDTH/DEPTH 60-70'/18" 
GRADIENT AND VELOCITIES 1° at 2-3' per second 
BOTTOM Gravel, scattered rocks. 
HIGH TIDE LOCATION At first bend toward the E. above gravel bar on N. bank. 
SCHOOLING AREAS No large schooling holes. 
SPAWNING AREAS _ Upper 200 yards utilized by salmon. Good gravel and current similar to main stream 
sections. 
GENERAL NOTES 
UPSTREAM 
LENGTH ACCESSIBLE 1mile AVERAGE WIDTH/DEPTH  50-60'/18" 
GRADIENT AND VELOCITIES 1° at 2-3' per second 
BOTTOM Gravel, heavy rocks and boulders. 
MARKER DISTANCE _  .9 mile, includes short section of N. fork. 
MARKER IDENTIFICATION End of good gravels. Bedrock areas above marker on S. fork. 
BARRIERS Falls .6 mile above fork on S. fork. Falls .4 mile up N. fork. 
TRIBUTARIES No important tributaries other than small trickles entering both forks. 
SCHOOLING AREAS Pools in main stream and at forks. 
SPAWNING AREAS _ Good grayel areas in main stream. First quarter mile of S. fork 15-20'/10" with good 
gravel, bedrock above. Poor facilities in steeper N. fork. 
GENERAL NOTES 
